QID 150509

Date Published: 2022-05-09

QID 150509: Lighttpd Server Path Traversal Vulnerability (CVE-2018-19052)

Lighttpd is a secure, fast, compliant, and very flexible web-server that has been optimized for high-performance environment.

An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character.

Affected versions:
lighttpd before 1.4.35

QID Detection Logic (Unauthenticated):
This QID sends a HTTP GET request and checks the response headers to confirm if the host is running vulnerable version of lighttpd Server.

Successful exploitation of the vulnerability may allow remote attackers to read sensitive files on the target server.

  • CVSS V3 rated as High - 7.5 severity.
  • CVSS V2 rated as Medium - 5 severity.
    • Solution
    Customers are advised to update lighttpd to new version.
    Vendor References

    CVEs related to QID 150509

    CVE-2018-19052 |
    Software Advisories
    Advisory ID Software Component Link
    Github URL Logo github.com/lighttpd/lighttpd1.4/commit/2105dae0f9d7a964375ce681e53cb165375f84c1
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